Drop 0.11.0 support (#4377)

There is a lot hack code for v0.11.0, which makes the code hard to
upgrade to newer vLLM version. Since v0.11.0 will release soon. Let's
drop v0.11.0 support first. Then we'll upgrade to v0.11.2 soon.


- vLLM version: v0.11.0
- vLLM main:
2918c1b49c

Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>

tests/ut/core/test_scheduler.py

@@ -9,6 +9,7 @@ from vllm.config import (CacheConfig, KVTransferConfig, ModelConfig,
 from vllm.multimodal.inputs import (MultiModalFeatureSpec,
                                     MultiModalKwargsItem, PlaceholderRange)
 from vllm.sampling_params import SamplingParams
+from vllm.utils.hashing import sha256
 from vllm.v1.core.kv_cache_utils import (get_request_block_hasher,
                                          init_none_hash)
 from vllm.v1.core.sched.output import SchedulerOutput
@@ -21,12 +22,6 @@ from vllm.v1.structured_output import StructuredOutputManager
 from tests.ut.base import TestBase
 from vllm_ascend.core.scheduler import AscendScheduler
 from vllm_ascend.core.scheduler_dynamic_batch import SchedulerDynamicBatch
-from vllm_ascend.utils import vllm_version_is
-
-if vllm_version_is("0.11.0"):
-    from vllm.utils import sha256
-else:
-    from vllm.utils.hashing import sha256
 
 EOS_TOKEN_ID = 50256
 MODEL = "Qwen3-0.6B"
@@ -181,23 +176,13 @@ class TestAscendScheduler(TestBase):
         )
         cache_config.num_gpu_blocks = 10000
 
-        if vllm_version_is("0.11.0"):
-            scheduler = AscendScheduler(
-                vllm_config=vllm_config,
-                kv_cache_config=kv_cache_config,
-                log_stats=True,
-                structured_output_manager=MagicMock(
-                    spec=StructuredOutputManager),
-            )
-        else:
-            scheduler = AscendScheduler(
-                vllm_config=vllm_config,
-                kv_cache_config=kv_cache_config,
-                log_stats=True,
-                block_size=block_size,
-                structured_output_manager=MagicMock(
-                    spec=StructuredOutputManager),
-            )
+        scheduler = AscendScheduler(
+            vllm_config=vllm_config,
+            kv_cache_config=kv_cache_config,
+            log_stats=True,
+            block_size=block_size,
+            structured_output_manager=MagicMock(spec=StructuredOutputManager),
+        )
 
         should_advance = MagicMock()
         should_advance.return_value = False